Fountain pen



March 29, 1932. E. LE BOEUF I 1,851,257

FOUNTAIN PEN Filed May 5, 1930 I VEN TOR.

ATTORNEYS.

'50. 1 This i ner ba r l 2, is Pr b of meta-1 Patented Mar. .29, 1932EUGENE Ln Boner, or SPRINGFIELD, MASSACHUSETTS fountain pens and isdirected more particu- FOUNTAIN PEN dl iplieati onsfi led'Iay 3,1936..Serial Nd. 449,448.

"Ti-his invention relates toimproveme'nts in larly to fountain pens ofthe self filling type;

' The principal objects ofthe invention are. j a the provision ofa -pen'comprising vafnovel combination and arrangement of parts which net onlyaids in the produotionof a pen, at

provides a pen strucra neininal cost but which ttire that "is durable;strong easily operable andhas a pleasingiappearanceg r 1 The novelfeaturesand'advantages of the inventiioniwill be'observ'ed froin'the'followinvention.

ing description thereof in the fornrat present 4 preferred; which forpurposes of, disclosure "are; llustrated 1n the accompanying draw;

in-gs; wherein:

Fig. 1 is aside elerational View of a foun tain pen embodying novelfeatures of the Fig.2.is a moved. I 7 I I c Fig. 3 1s a sideelevatlonalvrewof the: pen

' with the barrel in open position and partially "may be of usual-f0rm-- to" secure the parts together and to facilitate theeasy andready? shown in Section.

. Fig. l is aSectionaleleVational View the outer end of the-innerbarrel; c

Fig. 5 15a perspective- V ew of the expansion ring, one of the detailsof constructionk Referring to the; drawings thenovel fear-- tures of theinvention will now b'e described 'in detail.

-1 I'have vided with interfittingf screw threads which 2 separationthereof when it is desired to use point 8 and an ink feeding element 10which;

or fill the pen.

' In Fig. 2 thecap is removed from the bar-. rel to show a pen holder6'which carries a pen are arranged: in the regular manner. The

barrel 2 as distinguished from ordinary construction is movable towardsand away from.

the holder. .To facilitate this the barrelis slidable on an inner barrel12 which is secured to the holder 1n some suitable manner, such as byscrew threads, as shown.

Similar View with the; cap re er aim- P 1 which includes abarrel 2 andear 4'. The in: ner end ofthe barreland of the cap are pro? tubingsuchas brass tubing and serves to receive an ink sack 18 as well assupports the outer barrel. The outer barrel is preferably providedwit-haninterior metallic lining .or

shell 14' which .slidably embraces the inner barrel" In the form oftheinvention shown the made of some'non-ine'tallic material such as Hrubber, celluloid or the like while the inner barrel andslining areofinetal to facilitate.

-cap',"outer barreland holder are preferably;

accurate fitting of the relatively slidable parts and avoidexcessive-wear; warping and the like.

The inksacl 18 is otj ie'ldable of resilient 1 material such as rubberand is secured to'the" inner-fend of the pen holder: to[extendlongitu'din'ally through the inner barrel.

The outer end of" the inner barrel is pro;

vided' with slits Such as 20 which are spaced therearound so. that theend portion may yield or eXpand against the lining of the outer barrel.

Anoutwardly extending bead 22 is pro- "ivided around the "inner barreladjacent its H outer end and may be formed by'running {5a toolaround theinner side of the wall of 1 the barrel. Thislnakes an annular-groovearound the inner wall of the barrel (see I 4:), which is desirable forthe following-reason: I

An. annular ring member 24 of spring-like material bestsho'wn' in Fig;sis insertedin 'thei 'end of the inner barrel, This is split jlongitudinallyas, shown and has ahead 26 therearound which fits withinthe annular groove inside the inner barrel whereby the member-.24 isheld in place. "By being of spring-like Imjaterial 'and 'split as it,is, the ring2 tend's toexpand and yieldingly urge the split endoftheinner barrel against the lining of the outerba'r rel. A'tongue orkeeper 1 28' carried byttheexpansion ringli and e'xtendinginward'lythereof is received in an aperture at the outer end ofapressurebar.

rests upon th'eink seal 18; This keeper holds the bar againstappreciable" endwise movenients andyet allows the'pressure bar to be IOfiwhich extends inside the inner tube and rearwardly of the innerbarrel depressed inwardly to press the ink bag to deflate it.

A finger opening through the inner barrel and disposed over the pressurebar provides an opening through which a finger may be inserted foractuating the said bar.

As shown in Fig. 3 the barrel may be moved to expose the finger openingin the inner tube or barrel. This position of the barrel may be calledits open position (as shown). A groove is provided around the lining ofthe outer barrel into which the head of the inner barrel is forced byaction of the expansion spring. Thus as the barrel is pulled rearwardlyof the inner barrel the head will be snapped into the groove and tend tolock the outer and inner barrels against further relative movements. Ofcourse since the end of the inner barrel is yieldable against the actionof the expansion ring the outer barrel may be pulled entirely oil theinner barrel but the snapping of the bead into the groove will warnagainst this and serve to stop the relative movement of the outer barrelto adequately expose the finger opening for the purpose of filling thepen.

As the outer barrel is moved forwardly of the inner barrel from theposition shown in Fig. 3 to that shown in Fig. 2 or from a sack fillingposition to aolosed position the inner end of the outer barrel isdisposed adjacent or against the inner end of the holder 6. This isdesirable because the-inner barrel is completely enclosed and the holderappears to be integral with the inner barrel while the screw thread ofthe barrel is in suitable position for screwing into the cap.

To prevent relative rotative movements of the inner and outer barrels soas to not interfere with the screwing of the cap onto or oil of theouter barrel the said inner barrel is provided with a key 36 and theinterior of the barrel lining with a longitudinal groove which is insliding engagement with the key.

By providing an outer barrel which encloses the inner barrel and whichis movable as a unit relative to the upper part or holder of the pen asdistinguished from a barrel which is separable midway between its ends,the pen presents a pleasing appearance and is more easily and thereforemore economically manufactured. In fact not only are the parts whichoperate for filling the sack concealed by this single barrel, but thebarrel is easily movable to a position where the operating parts arereadily accessible.

An opening rel is provided as a vent to relieve pressure which may bebuilt up and depress the ink bag as the outer barrel is moved from theposition in Fig. 3 to a closed position.

By providing a single barrel for completely bears a pleasingappearanceandsince the in the wall of the inner bar I filling parts areconcealed thereby they are not likely to be caught by the parts of theclothing.

The expansive ring not only strengthens the outer end of the innerbarrel, but functions to expand the same and cause the positiveengagement of the bead of the inner barrel with the groove of the outerbarrel.

end of said barrel for expanding the same,

an inwardly projecting part associated with one of said membersreceivable inthe apex-s ture of said presser bar to hold the sameagainst axial movements and an outer barrel slidable on the inner barrelhaving an internal annular groove for receiving said bead.

2. A fountain pen comprising in combination, a pen holder having theinner end of an inner barrel member secured thereto which encloses asack secured to said holder, 9.

presser bar in said barrel having an aperture in its outer end adjacentthe outer end of said inner barrel member, the outer end of said barrelmember being provided with longitudinal slots and an external annularbead, a ring-like spring member in the outer end of said barrel forexpanding the same, an inwardly projecting part associated with one ofsaid members receivable in the aperture of said presser bar to hold thesame against axial movements, an outer barrel slidable on the innerbarrel having an internal annular groove for receiving said head and thesaid barrel provided with an interfitting slot and projection to holdthe same against relative rotation and to permit relative slidingmovements thereof.

In testimony whereof I aflix my signature.

EUGENE LE BOEUF.

enclosing the inner barrel the pen as a whole

